Improvement in flour-bolts



UNITED STATES .PATENT OFFICE.

JOHN CRAWFORD SMITH, OF ZANESFIELD, OHIO, ASSIGNOR TO HIMSELF,

SAMUEL BRADFORD SMITH, AND NATHANIEL STUART CREW, OF SAME PLACE.

IMPROVEMENT IN FLOUR-B-OvLTS.

Specification forming part of Letters Patent No. 117,938, dated August 8, 1871.

To all whom it may concern:

Be it known that I, J oHN CRAWFORD SMITH, of Zanesiield, in the county of Logan and State of Ohio, have invented certain new and useful Improvements in Flour-Bolts, of which the following is a specification:

The invention consists: First, in the employment of a hammer or knocker having a stroke `upon an attachment or projection from the rib in a direction longitudinal to the bolt, in contradistinction to radial or tangential thereto, as is usual. Second, in connecting the trigger and hammer by a twisted-wire cord. Third, in appliances for separating a portion of the oflal and returning it with the return fiour, as hereinafter specied.

Figure lis a longitudinal section of a flour-bolt illustrating my invention, the line z z in Fig. 2 illustrating the plane of section. Fig. 2 isa transverse section of the saine at a a', Fig. l. Fig. 3 is a view of a fragment of one of the ribs, illustrating a modification of the inode of applying the hammer thereto.

The shaft A, radial arms B, ribs C, and casing E may be of common construction. The cloth D is stretched around and fastened to the ribs C in any common or suitable way, a number of different grades arranged in novel manner being employed.

This arrangement of the cloth is as follows: Cominencing at the head of the reel with a section of N o. 10 cloth, forty inches wide, more or less, I apply successively sections of Nos. 11,12, and 13, each of about the saine width; then a section about twenty-eight inches wide ofNo. 5 cloth and another of about thirteen inches of 00 cloth, as indicated in Fig. l, or with Nos. 9, 10, ll, l2, 5, and 00 in the saine proportions, to suit different burs. Sections 10 to 13, or their equivalents, will be understood as discharging iiour, and sections 5 and 00 offal. Of the latter, from section 5, I propose returning a portion, say from onefourth to two-thirds, as and for purposes hereinafter more fully described. The most approved mode of clothing reels now in use is to commence at the head of the reel with No. S, N o. 9, or No. l0 cloth ruiming half-way, and then clothing the balance of the reel with one number finer. In double bolts the head ofthe second reel is clothed with the same number as the tail of the first reel, and the other half of the same with No. 6 or No.

7 cloth, and sometimes a small proportion of 000. The more chop in reels the slower they bolt. I thus, with my arrangement of four numbers of flour-cloth instead of two, obtain a more uniform bolt, from the fact that the nearer the tail of the reel proportionately the less chop there is for the bolting-surface. The finer numbers of cloth prevent specking. By this arrangement I ain also enabled to return a portion of the shorts or rounds, as before stated. This has a tendency to keep the cloth free and gives a portionof gluten in the our, which adds tothe quality and quantity,.and which in the old method of bolting is lost.

F F are hammers, attached to rods G and provided with springs H, by which they are thrown forcibly against the arms B, if arranged as shown in Fig. l, or against lugs c, projecting directly from the ribs C, as illustrated in Fig. 3. The retraction of the hammer necessary to produce this percussion is effected through the medium of cords I of twisted wire by means of triggers J. These may be formed as bell-cranks, working within guides K, and are operated by an adjustable tripping-cam, L, which constitutes a lever fulcrumed atl on the stationary casing E and within reach of the long arms of the triggers J, which project through the open end of the boltcylinder.

The adjustment of the tripping-cam back or forth determines the extent to which the successive triggers are moved, and thereby the force of the blow of the hammers. Dierent forms of tripping-cams may be employed, as preferred. By the arrangement illustrated in Fig. 3 I am enabled to locate the hammers yin any part of the length of the rib, without placing an arm at that point. The longitudinal blow of the hammer is found much more eifective in dislodging matter from the meshes of the cloth, and is less injurious to the reel or cloth than the radial or tangential blow which is commonly employed.

O represents a longitudinal drawer or equivalent provision to receive and distribute the iiour, Sto., as discharged by the reel. It is divided into two longitudinal compartments by a horizontal partition, O', the upper, M M1 M2 M3 Q, Q', constitutin g a conveyer-box, and the lower, N, areturn-trough, and is supplied with a suitable arrangement of passages. P represents a cantboard, subdividing the conveyer-box.

Sections 10 and 11 of the bolting-cloth discharge Hour into the conveyer-box at M, to be taken directly thence for use, While the successive sections, l2 13, discharge into the said boX at M1 and M27 from whence the flour is conducted into the return-trough N to be carried hack for retreatment. In order to mingle with this return flour a portion of the shorts or rounds, as stated, I employT the cant-board P to separa-te the offal discharged from sect-ion 5 of the bolt, so that a portion shall fall into the conveyer-box at M3, and be conducted to the returntrough N to mix with the return flour. One-third or more of the shorts from section 5 and the bran from section 00 passes through the conveyer-box at Q and Q', and through the return-trough N to an independent discharge. The cant-board P may be made adjustable, so as to divert in either direction a larger or smaller proportion of the oifal from section 5.

l claim as my inventionl. The arrangement of the springhammers F with the lugs or arms B formed on or applied to the ribs, as herein described, to deliver their strokes longitudinally upon said lugs or arms.

2. The combination of the twisted-Wire cords I, triggers J, and sprin g-hammers F, substantially as and for the purposes set forth.

3. The arrangement of the boltin g-cloth I), conveyer-box M M1 M2 M3 Q Q', cant-board P, and returirtrough N, constructed and operatin g substantially as and for the purposes set forth.

J. ORAVVFORD SMITH.

Witnesses:

RoB'r. E. DUNAWAY, SAML. B. SMITH. 

